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Transient photocurrent of bulk heterojunction solar cell characterized by ns-laser and sub-ms LED

Infahsaeng, Yingyot; Danna, Daniele; Tang, Zheng; Pascher, Torbjörn LU ; Inganas, Olle; Sundström, Villy LU and Yartsev, Arkady LU (2015) International Conference on Photonics Solutions (ICPS) In Proceedings of SPIE 9659.
Abstract
We measure the transient photocurrent of APFO3:PCBM bulk heterojunction solar cells illuminated with ns-laser and sub-ms LED light sources. The ratio of the number of collective charges to the number of excited photon (external quantum efficiency, EQE) and the transient photocurrent fall times have been carried out with difference pulse durations and fluences. The EQEs characterized by ns-laser source are shown to obey the bimolecular recombination at high excitation fluences. The increasing of transient photocurrent fall times suggests that the fall times of free charge carriers are effected by deep trap density of state (DoS) and thus the free charge carriers have a sufficient time for bimolecular recombination at short circuit... (More)
We measure the transient photocurrent of APFO3:PCBM bulk heterojunction solar cells illuminated with ns-laser and sub-ms LED light sources. The ratio of the number of collective charges to the number of excited photon (external quantum efficiency, EQE) and the transient photocurrent fall times have been carried out with difference pulse durations and fluences. The EQEs characterized by ns-laser source are shown to obey the bimolecular recombination at high excitation fluences. The increasing of transient photocurrent fall times suggests that the fall times of free charge carriers are effected by deep trap density of state (DoS) and thus the free charge carriers have a sufficient time for bimolecular recombination at short circuit condition. At the same fluences, however, the EQEs characterized by sub-ms LED sources exhibit an excitation fluences independence of EQE. The transient photocurrent fall times with sub-ms LED sources are rather constant when the excitation fluences increases indicating that the deep trap DoS has less effect at short circuit condition for longer pulse duration. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Transient photocurrent, Organic Solar Cells, Bulk heterojunction, APFO3
in
Proceedings of SPIE
volume
9659
publisher
SPIE
conference name
International Conference on Photonics Solutions (ICPS)
external identifiers
  • wos:000366498800046
  • scopus:84960860534
ISSN
0277-786X
1996-756X
DOI
10.1117/12.2195857
language
English
LU publication?
yes
id
ae25b13f-3bff-45ce-bd81-45d93bd05693 (old id 8556711)
date added to LUP
2016-01-28 09:00:10
date last changed
2017-01-01 03:09:51
@inproceedings{ae25b13f-3bff-45ce-bd81-45d93bd05693,
  abstract     = {We measure the transient photocurrent of APFO3:PCBM bulk heterojunction solar cells illuminated with ns-laser and sub-ms LED light sources. The ratio of the number of collective charges to the number of excited photon (external quantum efficiency, EQE) and the transient photocurrent fall times have been carried out with difference pulse durations and fluences. The EQEs characterized by ns-laser source are shown to obey the bimolecular recombination at high excitation fluences. The increasing of transient photocurrent fall times suggests that the fall times of free charge carriers are effected by deep trap density of state (DoS) and thus the free charge carriers have a sufficient time for bimolecular recombination at short circuit condition. At the same fluences, however, the EQEs characterized by sub-ms LED sources exhibit an excitation fluences independence of EQE. The transient photocurrent fall times with sub-ms LED sources are rather constant when the excitation fluences increases indicating that the deep trap DoS has less effect at short circuit condition for longer pulse duration.},
  author       = {Infahsaeng, Yingyot and Danna, Daniele and Tang, Zheng and Pascher, Torbjörn and Inganas, Olle and Sundström, Villy and Yartsev, Arkady},
  booktitle    = {Proceedings of SPIE},
  issn         = {0277-786X},
  keyword      = {Transient photocurrent,Organic Solar Cells,Bulk heterojunction,APFO3},
  language     = {eng},
  publisher    = {SPIE},
  title        = {Transient photocurrent of bulk heterojunction solar cell characterized by ns-laser and sub-ms LED},
  url          = {http://dx.doi.org/10.1117/12.2195857},
  volume       = {9659},
  year         = {2015},
}